Twenty years ago yesterday, cognitive scientist Stevan Harnad posted a message on a mailing list, a message he headed "A Subversive Proposal." This called on all researchers to make copies of the papers they published in scholarly journals freely available on the Internet. . . .

To celebrate the 20th anniversary of the Subversive Proposal, I emailed Harnad nine questions yesterday. These questions are published below, with Harnad's answers attached.